<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
		var wei = {length:3,0:0,1:1,2:2};
		var arr =Array.prototype.slice.call(wei);
		arr.push(3);
		console.log(arr);
	</script>
</html>
